Support assembly for seat beds



1951 J, A. FREEMON ET AL, 2,576,677

SUPPORT ASSEMBLY FOR SEAT BEDS Filed April 28, 1949 I s Sheets-Sheet 1 lhmentors (p/ JOSE/W A. Feet v 0 ISKEALJ EAT/1E FOQD J2, 2055 F. n/M, sa/v Nov. 27, 1951 J. A. FREEMON ET AL SUPPORT 'ASSEMBLY FOR SEAT BEDS 3 Sheets-Sheet 2 Filed April 28, 1949 s fi WWW a 5AA w# .W AMP M r k 5 E E, ma H Patented Nov. 27, 1951 SUPPORT ASSEMBLY FOR SEAT BEDS Joseph A. Freemon, Heiskell Weather-ford, Jr.,

and Robert F. Wilson, Memphis, Tenn., assignors to Sealy, Incorporated, Chicago, Ill., a

corporation of Delaware Application April 28, 1949, Serial No. 90,127

19 Claims.

This invention relates to certain new and useful improvements in the construction of frames for adjustable articles of furniture, being particularly related to lounge beds which are adapted in extended position to be used as beds and to be folded therefrom into a compact unit which may be employed as a lounge, sofa, chair or other seat.

There have been many efforts heretofore to produce a satisfactory article of furniture of the character referred to herein, but these previous efforts have failed to produce a fully satisfactory frame heretofore.

In particular, previous attempts to provide a foldable bed bottom have failed to satisfactorily limit the folding so that the frame has been subjected to undesired stresses during use as a chair or sofa, resulting in twisting or warping of the frame members. In some instances this problem has been recognized, but has only been solved by the addition of relatively cumbersome and otherwise undesirable structure in order to provide bracing means for the folded frame, and even these latter efforts have failed to provide a satisfactory brace at the point of maximum weight when the device is in use.

Prior efforts have further been unsatisfactory in the disposition of supporting legs for the frame, particularly in delaying the folding of the legs until a substantial portion of the folding of the frame has been accomplished.

The principal object, therefore, of this invention is to provide a foldable frame for a lounge bed of new and improved constructionand of extreme efficiency and simplicity of operation.

A further object of the invention is to provide such a structure which includes brace means maintaining the arrangement of the parts in folded position.

A further object of the invention is to provide means for automatically positioning the brace means during frame folding.

A further object of the invention is to provide means coupling the brace positioning means to one of the frame supporting legs for controlling operation thereof during folding and unfolding of the frame.

A further object of the invention is to provide such a structure having front legs and middle legs with means for accomplishing folding of these legs concurrently during an initial folding movement of the frame.

A further object of the invention is to provide a toggle means for controlling the folding and unfolding of middle frame supporting legs to accomplish such folding and unfolding during the movement of one frame section only.

A further object of this invention is to provide such a structure which includes means for limiting the unfolding of certain sections of the frame.

And a still further object of the invention is to generally improve the design. efiiciency and construction of foldable frames for convertible lounge beds and similar articles of furniture.

The means by which the foregoing and other objects of this invention are accomplished and the manner of their accomplishment will readily be understood from the following specification upon reference to the accompanying drawings. in which:

Fig. 1 is a side elevational view of the frame construction of this invention in chair or seating position in which the frame is fully folded.

Fg. 2 is a similar view of the frame in an intermediate folded position.

Fig. 3 is a similar view in a further intermediate folded position.

Fig. 4 is a fragmentary plan view of one side of the structure in extendedor bed position.

Fig. 5 is a sectional elevational view taken on the line VV of Fig. 4.

Fig. 6 is a fragmentary sectional elevation taken as on the line VV of Fig. 4 and illustrating the relation of the parts at the junction of two of the frame sections.

Fig. '7 is a. view similar to Fig. 6 of another frame section connection; and

Fig. 8 is a fragmentary sectional elevation on a scale similar to that of Figs. 6 and 7 illustrating the relation of certain of the parts when the frame is in the positions of Figs. 1 and 2.

Referring now to the drawings in which the various parts are indicated by numerals, it will be seen that the present invention relates to an article of furniture which consists of a sofa or chair having a back II and upright ends [3, all shown in broken lines, and a support assembly which in normal folded position (Fig. 1) serves as a seat support, supporting a suitable cushion or cushions 15 for use as a seat, and which is extendable by unfolding through intermediate positions (as Figs. 2 and 3) to form a bed bottom (Figs. 4 and 5) adapted to suitably support a mattress I! for use as a bed. It will further be seen that the support assembly consists of a pair of side frames disposed, together with their associated instrumentalities, respectively on opposite sides of the assembly and joined at their opposite ends by transverse end members I9, 20, the

assembly being completed by a suitable flexible spring fabric 2| which spans between and is attached to the side frames and end members. The mentioned side frames are identical and, therefore, reference will hereinafter be made to corresponding frame members by corresponding numerals.

From Fig. 1, it will be-seen that each of the side frames is foldable and when folded provides an upper substantially horizontal member 23, a front substantially vertical member 25, a lower substantially horizontal member?! and h rear substantially vertical member 29, the members being pivotally connected at their ends to adjacent members as at 3|, 32, 33. Each of the members is preferably formed of a suitable structural member, such as the angle irons illustrated, which are positioned with their outer flanges dish posed vertically and with their remaining flanges projected inwardly from the edges of the vertical flanges, spring 'f'ab'ric Zibeing preferably 'attached to' the inwardly projecting flanges. The respective members of'one frame cooperate with the corresponding members of'the opposite frame and the spring fabric 2| to form support assembly sections, each section consisting of a pair of opposite members and the portion of the spring fabric-2| spanning therebetween and being 'posi tioned to correspond with the respective positions of the frame members as illustrated. Thus it will be seen that the "support assembly in Fig. 1 includes an upper horizontal section, a front vertical section, a lower horizontal section, and a rear vertical section,

Each side frame includes a brace arm 35, which, when the frame is folded, extends substantially verticallybetween the upper and lower horizontal, members, the upper end e ng attached to the vertical'flange of the perrnember' 23 and the lowehendt'l'of thefar eating on the inwardly re eeiih he iephie l @ii .fiefi lower m ember ZiftoeKectiv er ve as a suphcriihe Pes ea n h the ewerih hibereh ng the. u p he hher.-. The tire Qpms ie hrace ms 5 thus. ef ect vely main a n th 1 212. horizontal section in horigontal position during use. of the device, as a, seat. .It, is alsa preferred that the. bracev armsbe slightly in ned. w th the lower n rearward of the upper. ehdtoibetter adapt the braces to receiveweight thrusts. irn parted in use. It. will beseen that the point of attachment of thebrace arms; to. the upper members 23is preferablyintermediate the. length of. each upper member, thus placing the postlike braces substantially beneath the'midepoint of the horizontal frame membersto directly re.- ceive the maximum load; on the. frames during use as a seat, and thereby most efliciently acting to support such load and: prevent bending. or warping of the frames through. use. It is pre-,, ferred also thatthe attachmentof the brace arm 35 to the upper member 23 bepivotal in order to.

permit movement of the brace arm out of the aforesaid vertical relation tov the upper member when the frames are extended to bed position.

In order to automaticallyeffect movement ofv the brace arm 35 from its vertical relation to the member 23 during unfoldin of the. side frame, means attached to the brace arm are. provided and are oppositely attached to a member. other. than the member 23.. In thepresent illustration, one end ofa control arm 39- .is pivoted to the. arm. 35 adjacent the lower end 3'! of, the brace oted to the member 25 adjacent the pivotal connection 32 between members 25, 21. It will be seen that this preferred form of brace arm control lies substantially parallel to the member 2'! when the frame is folded as in Fig. 1. The preferred arm 39 is found to be effective in control of the movement of the brace arm 35, not only during unfolding of the frame, but also during opposite folding movement to move the brace arm 35 into post position, and in addition the arms 35, 39, articulated at their pivotal connection, effectively form a toggle which is employed in the preferred operation of the device.

It will be s'een from Figs. 4 and 5 that when the support assembly is unfolded to form the bed bottom the upper members 23 become the outer members, the front vertical members 25 and the lower members" 2? become intermediate middle members and the rear members 29 become inner members. When thus unfolded the respective frame members are. moved into co-planar relation with the inwardly projecting flanges disposed in horizontal position so as to provide a substantially flat bed bottom.

Support of the bed bottom is accomplishedpreferably. by. front legs 4| and middle legs 43. The front legs 4|. are. pivotally attached to members 23 adjacent the outer ends of those members in unfolded bedposition, and preferablythe front legs 4.] include extensions. 45. which project above the respective members 23 and to which leg. control links 41. are pivotally attached at one end, the opposite ends of links 41 being attachedpivotally to. the intermediate members 25 as at 49. The middle legs 43 are preferably pivotally attached to: brackets 5| which are rigidly secured to the under side of the intermediate members 25 adjacent the pivotal connectionsai between the members 25 and the members 23.

A leg control link 53 is preferably pivotally at-. tached at one, end to the middle leg 43 and at its opposite end is attached to the brace control arm 39. Through the medium of this attachment, pivotal movement of the leg 43 is controlled by the link. 53 utilizing. the previously mentioned toggle action of the articulated arms 35, 39.

An elevator arm 55- is pivotally attached at one end to the member. 21 intermediate the length of that member and is also pivoted as at 51 to a portion 58. of the chairor sofa. The elevator arm 55. preferablyincludes an extension 59 projecting beyond the. pivot 51, to which extens'ion 59. counter-balance spring. BI is attached, the opposite end.- of the spring being attached in suitable fashion to the. portion 58 as at 63. The

rear members 29, are pivotally supported from the sofa, being preferably. provided with portions 65 disposed perpendicularly to therear. members 29, and. rigidly. fixed to the rear. ends thereof and pivoted. as at 6.1: at their upper ends in suitable fashion to the sofa.

In the operation. of the. device, during movement from the fully folded seat position illustrated in Fig. l, the front of the device is grasped and raised. Thismovement is assisted by the spring 6| which, as illustrated in Fig. 1, is at that time under tension. Asthe frame is moved upwardly theelevator arm 55 swings upwardly about its lower pivot 51, this movement being continued until the device is moved to the position illustrated in Fig. 2, in which it will be seen that therear member 29 has moved about its pivotal support into. co-planar relation" with arm, and, at, itsv oppositecnd, thearm Baispiv- 76;: the intermediatememberik Itwi1l-beobserved has been moved forwardly and isprimarly .sup-.

ported by the elevator arm 55. It has been found that under unfavorable conditions relative movement between the members 21, 29 may continue about their pivotal connection 33 and in order to insure against such over-travel or undesired movement of these members beyond co-planar relation it is desirable to provide suitable abutment members which come into engagement when the members have reached co-planar relation and prevent movement therebeyond. In the preferred form illustrated, the inwardly projecting flanges of the members 21, 29 are deformed adjacent the pivotal connection 33 between these members, forming flanges 69, disposed perpendicularly to the inwardly projecting flanges. These flanges are preferably bolstered in suitable fashion by gussets 'l'l. While it is preferred to form the flanges 69, in integral with the flanges of the respective members, it will be understood that separate flange members may be added to or otherwise integrated with the frame members without departing herefrom. It Will be seen that when the frame reaches the position of Fig. 2, the flanges 69, 19 are brought into face abutment, and project downwardly, and are effective to prevent further relative movement of the frame members beyond co-planar relation.

After the device has been moved to the position shown in Fig. 2, unfolding is continued by raising the upper horizontal members 23 and the spring fabric 21 spanning therebetween. This movement effects movement of the intermediate members 25 about the pivotal connection 32 of thosemembers to the members 21, moving the device to the position illustrated in Fig. 3, in which the members 23 and 25 have been moved into co-planar relation with the already alined members 21, 29. It will be seen that although the unfolding of the device has progressed through the great majority of its extension no movement of the legs 4 I, 43 relative to the frame members 23, 2 5,or of the arms 35, 39 relative to the frame members 23, 25, has takenplace, the ultimate outer end of the device remaining compactly folded in desired fashion. It is again found that under unfavorable circumstances the Weight of the compact sections will sometimes tend to cause movement of the intermediate frame members 25 downwardly about the pivotal connection 32, beyond co-planar relation with the previously alined frame members and in order to avoid this movement beyond co-planar relation it is preferred to provide abutment members, such as the flanges 13, 14 which, similar to the flanges 69, 10 are preferably formed as integral downwardly projecting extensions of the horizontal flanges of the members 25, 21 and preferably the flanges 13, 74 are bolstered by gussets 15.

As in the case of the flanges 69, 10, the flanges I3, 14, though preferably formed from the horizontal flanges of the frame members 25, 21, may consist of separate members attached in suitable fashion to the frame members or otherwise integrated therewith. When the frame members 25, 2'! are moved into co-planar relation the flanges 13, 14 are brought into abutment and effectively serve to interrupt movement of the frame members 25 beyond alinement with the members 21, 29.

From the position of Fig. 3, extension of the device is completed by continuing the movement of the frame members 23 about the pivotal connection 3| of those members to the members 25.

As this unfolding movement is carried on the con-=.

current movement of the legs 4|, 43 is accomplished, the link 4'! acting to move the front leg 4| about the pivotal attachment of that leg to the frame member 23 into vertical relation, the

front leg 4| being of a length to extend to the floor.

or other supporting surface and to effect support of the outer end of the outer section of the bed. Simultaneously the arm 39 acts upon the brace arm to move the brace arm out of vertical relation with the frame member 23 and the two arms 35, 39 acting as a toggle are effective through the link 53 to effect movement of the middle leg 43 into vertical relation to the frame, effecting support of the frame adjacent the pivotal connection 3|.

It will be observed that in the preferred form illustrated the end portion 31 of the arm 35 is preferably beveled so that the edge of that portion does not extend beyond the edge of the arm 39 in extended position of the frame.

When it is desired to convert the device from bed position to seating position the movements are reversed. The outer section of the bed, consisting of the frame members 23 and the springfabric 2| spanning therebetween, is raised about the pivotal connections 3| to the adjacent section, returning the device to the position illustrated in Fig. 3. It will be observed that during this initial movement from bed position, the brace arm 35 is moved by the arm 39 into relation substantially perpendicular to the frame member 23 and that the arms 35, 39 acting out as a toggle are effective through the link 53 to fold the middle leg 43 into a position substantially parallel with the frame members 25. Simultaneously the link 41 is effective to move the front leg 4| into substantially parallel relation with the member 23,- thus effecting relative positioning of these instrumentalities with respect to the frame members 23, 25. Further movement of the device to seating position thereafter merely consists of folding the compacted assembly about their respective pivotal connections and subsequently lowering the folded device from the position of Fig. 2 to that of Fig. 1.

When the device has been returned to the position of Fig. 1, it is now ready for use as a seat and the sofa cushion l 5 may be positioned on the now upper horizontal section of the device. Pref-' erably, for the appearance of the device, a cover; member 11 is attached at its opposite ends toathe' legs 43 and spans therebetween transverse the device. This cover member may be provided with suitable upholstery or other decoration to blend with the finish of the article of furniture and preferably co-operates with a fixed cover member 19 attached to the article of furniture adjacent the base thereof.

We claim:

1. In an extendable seat-bed which includes in folded position upper and lower horizontal sections and a vertical section joining said horizon. tal sections, a brace member pivotally attached at one end to said upper section and extending downwardly therefrom substantially vertically to seat at its opposite end on said lower section, and an arm pivotally attached at one end to said brace member and at its opposite end to said vertical section, effective to move said brace mem-' ber out of vertical relation to said upper section during extending of said seat-bed and into said vertical relation during folding of said seatbed. j 2. In an extendable sofa bed which includes in folded position upper and lower horizontal anger? sections and a vertical section joining said horizontal sections, a brace member pivotally at:- tached at one end to said upper section and ex-- tending downwardly therefrom substantially vertically to seat at its opposite end on said lower section, and an arm pivotally attached at one end to said brace member adjacent said seated end of said brace member, the opposite end of said arm being pivotally attached to said vertical section, said arm being effective to move said brace member out of vertical relation to said upper section during extending of said seat bed and into said vertical relation during folding of said seat bed.

3. In an extendable seat-bed which includes in folded position upper and lower horizontal sections and a vertical section joining said horizontal sections, a brace member pivotally attached at its upper end tosaid upper section and extending downwardly therefrom substantially vertically, and an arm pivotally attached at one end to the lower portion of said brace member, said brace member extending downwardly below the said attachment of said arm to seat at its lower end on said lower section and brace said upper Section, the opposite end of said arm being pivotally attached to said vertical section, whereby said arm is effective to move said brace member out of vertical relation to said upper section during extending of said seat -bed and into said vertical relation during folding of said seat bed.

4. In a seat bed, in combination, a plurality of relatively foldable support assembly sections pivoted to each other for movement from folded seating condition to extended co-planar bed posi tion and return, said support assembly in folded condition including an upper horizontal section, a lower horizontal section and a front vertical section extending between and connected at itsopposite ends respectively to said horizontal sections, a leg pivotally connected to said front section and parallel thereto, a first arm pivoted to said front section and a second arm pivoted to said upper section, said arms being articulated to form a toggle, a leg link connecting said first arm and said leg for extending said leg when said upper section is unfolded with respect to said front section, the toggle formed of said arms bemg extended by said unfolding, said second arm being su'sbtantially vertical when said support assembly is in folded condition and seating at its lower end on said lower section for bracing said upper section, and means associated with said front and said lower sections for preventing relative unfolding beyond co-planar relation of said front and lower sections.

5. In a seat bed, in combination, a pluralityof relatively foldable support assembly sections pivoted to each other for movement from folded seating condition to extended co-planar bed position and return, said support assembly in folded condition including an upper horizontal" section, a lower horizontal section and afront vertical section extending between and connected at its opposite ends respectively to said horizon= tal sections, a leg pivotally connected to said front section and parallel thereto, a first armpivoted to said front section and a second armpivoted to said upper section, saidarms being articulated to form a toggle; a leg link connectingsaid. first arm and said leg for extending said leglwhen said upper section is unfolded. with re-- spect to said frontsection, the toggle formed of said armsbeing extended by said unfolding, said second: arm. being substantially vertical when said support assembly is: in folded condition and seating at its, lower end on said lower section for bracing said upper section, said front section having a forwardly projecting flange at its lower end, and said lower section having a depending flange at its forward end, said flanges be ing. adjacent the connection between said front and lower sections and being moved into abutting juxtaposition when said front section is unfolded with respect to said lower section.

6. In a seat bed, incombination, a plurality of relatively fold'able support assembly sections pivoted to each other for movement from folded seating condition to extended co-planar bed. posttion and return, said support assembly in folded condition including an. upper horizontal section, a lower horizontal section and a front vertical section extending between and connected at its opposite ends respectively to said horizontal sec-' tions, 9. leg pivotally connected to said front section and parallel thereto, a first arm pivoted to said front section and a second arm pivoted to said upper section, said arms being articulated to form a toggle, a leg link connecting said first arm and said leg for extending said leg when said upper section is unfolded with respect to said front section, the toggle formed of saidarms being extended by said unfolding, said second arm being substantially vertical when said support assembly is in folded condition andhaving an extension projecting'downwardly beyond the point of articulation of said arms, said extension seating on said lowersection for bracing said upper. section, and means associated with said.

front and said lower sections for preventing relative unfolding beyond co-planar relation of said front and lower sections.

'7. In a seat bed, in combination, a plurality of relatively foldable support assembly sections pivoted to each other for movement from folded seating condition to extended co-planar bed pOSiftion and return, said support assembly in folded conditionincluding an upper horizontal section, a lower horizontal section, and a front vertical section extending between and connected at its opposite ends respectively to said horizontal sections, a leg pivotally connected to said frontsec tion and parallel thereto; a first arm pivoted to said front section and a second arm pivoted to said upper section, said arms being articulatedto'form a toggle; a leg link connecting said first arm and said legfor extending said leg when said upper section is unfolded with respect to said front section, the toggle formed of said arms being extended by said unfolding, said second aim being substantially vertical when said support assembly is in folded condition and having an extension projecting downwardly beyond the point of articulation of said arms, said extension seating on said lower section for bracing said upper section, said front section having a forwardly projecting flange at its lower end, and said lower. section having a depending flange at its forward end, said flanges being adjacent the connection between said front and lower sections and being moved into abutting juxtaposition when said front section is unfolded with respect to said lower section.

8. In a seat bed, in combination, a plurality of relatively foldable support assembly sections: pivoted to each other for movement from folded sea-ting condition to extended co-planar bed position and return, said support assembly in folded: condition including an upper horizontal section,

a lower horizontal section, and a frontwvertical section extending between and connected at its opposite ends respectively to said horizontal sections, a leg pivotally connected to said front section and parallel thereto; a first arm pivoted to said front section and a second arm pivoted to said upper section, said arms being articulated to form a toggle; a leg link connecting said first arm and said leg for extending said leg when said upper section is unfolded with respect to said front section, said second arm being substantially vertical when said seat bed is in folded position and having an extension projecting beyond the point of articulation of said arms, said extension tion and return, said support assembly in folded condition including an upper horizontal section, a lower horizontal section and a front vertical section extending betgseen and connected at its opposite ends respectively to said horizontal sections, a leg pivotally connected to said front section and parallel thereto, a first arm pivoted to said front section and a second arm pivoted to said upper section, said arms being articulated to form a toggle, a leg link connecting said first arm and said leg for extending said leg when said upper section is unfolded with respect'to said front section, the toggle formed of said arms being extended by said unfolding, said second arm being substantially vertical when said support assembly is in folded condition and having an extension projecting downwardly beyond the point of articulation of said arms, said extension seating on said lower section for bracing said upper section, said front section having a forwardly projecting flange at its lower end, and said lower section having a depending flange at its forward end, said flanges being adjacent the connection between said front and lower sections and being moved into abutting juxtaposition when said front section is unfolded with respect to said lower section, to prevent relative unfolding beyond co-planar relation of said front and lower sections, said extensions being beveled along its upper edge to coincide with the adjacent upper edge of said first arm when said arms are extended during unfolding of said support assembly.

10. A support assembly for a seat bed comprising a, plurality of sections pivotally connected for relative folding movement from bed position to seating position and return, said sections in bed position of said assembly being disposed in horizontal co-planar relation and including an outer section, an intermediate section connected at one end to said outer section, and a third section connected to the opposite end of said intermediate section, an arm pivoted to said outer section, a second arm pivoted to said interme diate section, said arms being articulated to form a toggle, said outer and intermediate sections having perpendicularly disposed leg means pivotally connected thereto, a link connecting said outer section leg means and said intermediate section, a. second link connecting said interme- .10 diate' section leg means and said second arm, said links and toggle being effective during folding movement of said outer section relative to said intermediate section to concurrently position said legs respectively substantially parallel to their associated said sections.

11. A support assembly for a seat bed comprising-a plurality of sections pivotally connected for relative folding from bed position to seating position and return, said sections in bed position of said assembly being disposed in horizontal co-planar'relation, a leg pivoted to one of said sections, a second leg pivoted to a section adjacent the one said section, a pair of arms respectively pivoted to said adjacent sections, said arms being articulated to form a toggle, a link connecting the first said leg and the second said adjacent section, a second link connecting the other said leg and said toggle, said links and toggle being effective, during relative folding movement of said adjacent sections only, to concurrently position said legs respectively substantially parallel to their "associated said sections.

12. A support assembly for a seat bed comprising a plurality of sections pivotally connected for relative folding from bed position to seating position and return, said sections in bed position of said assembly being disposed in horizontal co-planar relation, a leg pivoted to one of said sections, a sec-0nd leg pivoted to a second section adjacent the one said section, a pair of arms respectively pivoted to said adjacent sections and articulated to form a toggle, means connecting the said second leg to said toggle, means connecting the other said leg to said second section, said connecting means and toggle being effective, during relative folding movement of said adjacent sections only, to concurrently position said legs respectively substantially parallel to their associated said sections.

13. In'an extendable seat-bed which includes in folded position upper and lower horizontal members and a vertical 'member joining said horizontal members, a brace pivotally attached at one end to one of said horizontal members and extending from said attachment substantially vertically to seat at its opposite end against the other said horizontal member, and an arm pivotally attached at one end to said brace and at its opposite end to said vertical member, effective to move said brace out of vertical relation to said horizontal members during extending of said seat-bed.

14. In a seat bed, in combination, a plurality of relatively foldable support assembly sections pivoted to each other for movement from folded seating condition to extended co-planar bed position and return, said support assembly in folded condition including an upper horizontal section, a lower horizontal section and a front vertical section extending between and connected at its opposite ends respectively to said horizontal sections, a leg pivotally connected to said front section and parallel thereto, a first arm pivoted to said front section and a second arm pivoted to said upper section, said arms being articulated to form a toggle, and a leg link connecting said first arm and said leg for extending said leg when said upper section is unfolded with respect to said front section.

15. In a seat bed, in combination, a plurality of relatively foldable support asembly sections pivoted to each other for movement from folded seating condition to extended co-planar bed position and return, said support assembly in folded condition including an upper horizontal section,

a lower horizontal section and a front vertical section extending between and connected at its opposite ends respectively to said horizontal sections, a leg pivotally connected to said front section and parallel thereto, a first arm pivoted to said front section and a second arm pivoted to said upper section, said arms being articulated to form a toggle, a leg link connecting said first arm and said leg for extending said leg when said upper section is unfolded with respect to said front section, the toggle formed of said arms being extended by said unfolding, said second arm being substantially vertical when said support assembly is in folded condition and seating at its lower end on said lower section for bracing said upper section.

16; A support assembly for a seat bed, comprising a plurality of relatively foldable support assembly sections pivoted to each other for movement from folded seating condition to extended co-planar bed position and return, said sections in folded condition of said support assembly including upper and lower horizontal sections and a vertical section joining said horizontal sections, a leg pivotally connected to said vertical section and parallel thereto, a brace arm pivoted at one end of said upper section and seated at its opposite end on said lower section, a second arm pivoted to said vertical section, said arms being articulated to form a toggle, and a leg link connecting saidsecond arm and said leg for extending said leg when said upper section is unfolded with respect to said vertical section.

1'7. A support assembly for a seat bed, comprising a plurality of relatively foldable support assembly sections pivoted to each other for movement from folded seating condition to extended co-planar bed position and return, said sections in folded condition of said support assembly including upper and lower horizontal sections and a vertical section joining said horizontal sections,

a. leg pivotally connected to said vertical section and parallel thereto, a brace arm pivoted at one end to said upper section and seated at its opposite end on said lower section, an arm pivoted to said vertical section, said arms being articu- '12 lated to form a toggle, and aleg link connecting said toggle and said leg for extending said leg when said upper section is unfolded with respect to said vertical section.

18. In an extendable seat-bed which includes in folded position upper and. lower horizontal members and a vertical member joining said horizontal members, a brace pivotally attached to one of said horizontal members and. extending one end to said upper horizontal member and ex.-

tending downwardly from said attachment to seat at its opposite end in bracing relation against said lower horizontal member, and an arm pivotally attached at one end to said brace and at its opposite end to said vertical member, effective to move said brace out of bracing relation to said horizontal members during extending of said seat-bed.

JOSEPH A. t EMON.

HEISKELL E-ATHERFORD, JR.

ROBERT F. WILSON.

REFERENCES CITED The following references are of record in the file of this patent:

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